Uh, definitely not, assuming you're hosting on our Master Server. Check the rules section on ms.srb2.org for more info.
The TL;DR is that we don't allow repacks on the MS because it FORCES people to download the file, even though they may already have each mod included in it. It's silly and a total waste of time for everyone involved.
You'd be better off writing a list of commands that add each file, saving it as a .txt, and running the exec command with the name of the list file.